Article
Multidisciplinary Sciences
Vita Paramita, Nanang Masruchin, Yohanes Widodo Wirohadidjojo, Buwono Puruhito, Hermawan Dwi Ariyanto, Mohamad Endy Yulianto, Indah Hartati, Eflita Yohana, Furqon Hidayatulloh, Tris Sutrisno, Bagus Wijayanto
Summary: This study proposed a green tea blanching process followed by spray drying the extracts with maltodextrin. The optimization of powder particle size successfully increased the content of major chemical components in green tea. Results showed that this process yielded excellent overall responses and individual desirability.
SCIENTIFIC REPORTS
(2022)
Article
Food Science & Technology
Ruimin Wang, Weimin Zhang, Ruiping He, Wu Li, Lu Wang
Summary: The study evaluated the use of eco-friendly deep eutectic solvents (DESs) in extracting phenolic antioxidants from dogbane leaf-tea (DLT). An innovative and efficient solvent, choline chloride-levulinic acid (ChCl-LevA), was screened and used in ultrasonic-assisted extraction (UAE) of phenolic compounds from DLT. The results showed that ChCl-LevA-based UAE yielded higher phenolic contents, stronger antioxidant activity, and anti-alpha-glucosidase activity (alpha-GIA) compared to other extraction methods.
Article
Chemistry, Applied
Xinyu Wang, Xiaoyan Liu, Naiwen Shi, Zhuanyuan Zhang, Yiming Chen, Mingyan Yan, Yinping Li
Summary: In this study, the maximum extracted efficiency of okra polyphenols was determined using response surface methodology, and 27 compounds were identified in okra polyphenols using HPLC-ESI-QTOF-MS/MS. Additionally, okra polyphenols exhibited strong antioxidant activity and alleviated oxidative damage.
Article
Acoustics
Parvin Sharayei, Elham Azarpazhooh, Shahin Zomorodi, Soodabeh Einafshar, Hosahalli S. Ramaswamy
Summary: This study aimed to optimize the extraction of astaxanthin from shrimp shells, using different solvents and extraction times. The optimal extraction conditions were determined using the ultrasonic method, yielding high levels of astaxanthin and antioxidant properties. The results were validated through extraction and analysis at the optimum point.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Food Science & Technology
Seyed-Ahmad Shahidi
Summary: The optimization of extraction conditions for the antioxidant-rich extract from Ficaria Kochii plant was achieved using an ultrasound-assisted system and response surface methodology. The study found that the optimal conditions for extraction using methanol were a solvent-to-raw material ratio of 10%, an extraction time of 50 minutes, and an extraction temperature of 60 degrees C. Under these conditions, the extract had a total phenolic content of 46.379 mg gallic acid equivalents/g dry matter, a total flavonoid content of 11.754 mg quercetin equivalents/g dry matter, and an antioxidant activity of 89.548%. Similarly, the optimal conditions for extraction using water were a solvent-to-raw material ratio of 10%, an extraction time of 30 minutes, and an extraction temperature of 40 degrees C. The resulting extract had a total phenolic content of 51.112 mg gallic acid equivalents/g dry matter, a total flavonoid content of 4.331 mg quercetin equivalents/g dry matter, and an antioxidant activity of 97.004%. This study suggests that the antioxidant-rich extract from Ficaria Kochii could be used as a candidate for food antioxidants and for food storage.
FOOD AND CHEMICAL TOXICOLOGY
(2022)
Article
Biochemistry & Molecular Biology
K. L. Baltrusch, M. D. Torres, H. Dominguez, N. Florez-Fernandez
Summary: The tea industry can utilize its by-products to produce bioactive tea extracts for various applications. This study successfully stabilized and protected tea extracts using biopolymer delivery systems such as starch, carrageenan, or alginate. The resulting microencapsulated tea extracts exhibited high efficiency and showed promising properties for future applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Multidisciplinary Sciences
Tesfaye Benti, Adugna Debela, Yetenayet Bekele, Sultan Suleman
Summary: This study evaluated the biochemical constituents, antioxidant content, and cup quality of Camellia sinensis clones in Ethiopia at different nitrogen application rates. The results showed that the polyphenol and total nitrogen content slightly increased with higher nitrogen application rates. Caffeine content varied among clones and nitrogen treatments. The overall quality of green tea improved with increased nitrogen application rate, with clones 6/8 and 11/4 scoring the highest.
Article
Engineering, Chemical
Le Trung Khoang, Hoang Thi Thu Huyen, Huynh Van Chung, Le Xuan Duy, Tran Quoc Toan, Hoang Thi Bich, Pham Thi Hong Minh, Dung Thuy Nguyen Pham, Tran Thien Hien
Summary: This study optimized the process of total saponins extraction from P. fruticosa roots using the ultrasonic-assisted extraction (UAE) method and evaluated its cytotoxic effect against cancer cell lines. The results confirmed that triterpene saponin is an important chemical component in P. fruticosa roots with significant biological activities. In addition, UAE was found to be a highly efficient method for saponins extraction.
Article
Horticulture
Mariana Cecilia Grohar, Barbara Gacnik, Maja Mikulic Petkovsek, Metka Hudina, Robert Veberic
Summary: The study investigated the caffeine content and phenolic profile of different types of teas and coffees with two successive extractions. Green tea showed high flavanol content in the second extraction, while mate tea's phenolic acid content increased. Black tea had the highest caffeine content in both extractions, and water was the most effective solvent in most cases for extracting these compounds.
Article
Chemistry, Multidisciplinary
Anna Wirwis, Zygmunt Sadowski
Summary: This paper presents the optimization of green tealeaf extraction and subsequent synthesis of silver nanoparticles (AgNPs) using water and hydroalcoholic solvents. The independent variables, including pH, time, and temperature, were determined through single-factor experiments and used for extraction according to the Box-Behnken design. The optimal extraction conditions were determined to be pH = 7, 30 min, 80 & DEG;C for water and pH = 5.5, 50 min, and 80 & DEG;C for water-ethanol. The physicochemical properties of AgNPs obtained from both extractants were compared, and a predicted mechanism for the reduction and stabilization of AgNPs was proposed based on Fourier transform infrared data.
Article
Multidisciplinary Sciences
Qingfen Wang, Fei Yang, Dandan Jia, Tian Wu
Summary: This study optimized the extraction parameters of polysaccharides and polyphenols from Morinda citrifolia fruit tea using response surface methodology, with the highest yields achieved under specific temperature and time conditions. The research provides a scientific basis for obtaining these compounds from dry Morinda citrifolia fruit slice tea by brewing.
Article
Biochemical Research Methods
Gouhar Jahan Ashraf, Priya Das, Ranabir Sahu, Gouranga Nandi, Paramita Paul, Tarun Kumar Dua
Summary: This study investigated and optimized the ultrasonic-assisted extraction and quantification of caffeine and polyphenols from green tea using 2(3)-full factorial design and high-performance thin-layer chromatography. The results showed that sonication can simplify the extraction process and achieve higher extractive yield and concentration of caffeine and polyphenols compared to traditional methods. Scanning electron microscopy images revealed physical alterations and cell wall disintegration in the matrix, which accelerated the extraction process.
BIOMEDICAL CHROMATOGRAPHY
(2023)
Article
Energy & Fuels
Yongjun You, Chong Liu, Qi Xu, Xuefei Hu, Simin Zhang, Changhan Wang, Huanliang Guo, Chao Tang
Summary: This study optimized the main parameters of ultrasonic-assisted oil recovery from oily sludge using a response surface method. The study identified the best conditions for oil recovery and analyzed the characteristics of the recovered oil and residue.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Faiza Imtiaz, Dildar Ahmed, Rana Haris Abdullah, Samra Ihsan
Summary: In this study, efficient and eco-friendly techniques, microwave-assisted extraction (MAE) and ultrasound-assisted extraction (UAE), were optimized to extract bioactives from Thuja orientalis. Both techniques showed effectiveness in fracturing the cell matrix and extracting phenolic compounds, antioxidants, and metal chelators. MAE was found to be more efficient in TPC, TFC, and ABTS-RSA, while UAE showed higher efficiency in DPPH-RSA and MCA.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Multidisciplinary Sciences
Sadaf Parvez, Idrees Ahmed Wani, F. A. Masoodi
Summary: The study optimized the extraction process of salted green tea using response surface methodology and found that brewing conditions have a significant impact on the yield, antioxidant activity, total phenols, and caffeine content of salted green tea.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
